Disclosed is an apparatus for battery-free measuring vital signs of a user from a single position near the user influenced by an alternating electric field provided by an electronic device. The apparatus includes a first electronic circuitry, a second electronic circuitry stacked to the first electronic circuitry, an instrumentation amplifier for amplifying the signals, an analog/digital converting logic circuit for generating digitized information, and a communication unit for communicating the digitized information. The first electronic circuitry includes a first electrode for receiving vital signals (acoustic, mechanical, electrical signals) from the user's body, a first shield unit for shielding the first electrode from electrical influences and influenced by the alternating electric field provided by the electronic device, a first rectifier for harvesting and rectifying the received alternating electric field from the first shield unit, further the first rectifier provides DC energy, a first buffer stores the DC energy and provides differential voltages, a first programmable operational amplifier amplifies the amplitude of the received vital signs powered by the received differential voltage from the first buffer.

Disclosed is an apparatus for battery-free measuring vital signs of a user from a single position near the user influenced by an alternating electric field provided by an electronic device. The apparatus includes a first electronic circuitry, a second electronic circuitry stacked to the first electronic circuitry, an instrumentation amplifier for amplifying the signals, an analog/digital converting logic circuit for generating digitized information, and a communication unit for communicating the digitized information. The first electronic circuitry includes a first electrode for receiving vital signals (acoustic, mechanical, electrical signals) from the user's body, a first shield unit for shielding the first electrode from electrical influences and influenced by the alternating electric field provided by the electronic device, a first rectifier for harvesting and rectifying the received alternating electric field from the first shield unit, further the first rectifier provides DC energy, a first buffer stores the DC energy and provides differential voltages, a first programmable operational amplifier amplifies the amplitude of the received vital signs powered by the received differential voltage from the first buffer.

An ECG sensor system comprising: a substrate having a first side and a second side, the substrate of a non-conducting material; a plurality of textile-based sensors positioned on the first side, each of the plurality of textile-based sensors spaced apart from one another on the first side, the second side covering one side of the each of the plurality of textile-based sensors as an insulating covering, the each of the plurality of textile-based sensors including conductive fibres interlaced with one another; and a conductive trace connected to the each of the plurality of textile-based sensors, each of the conductive traces for connecting the plurality of textile-based sensors to an electronic controller for sending and receiving electronic signals from a selected pair of the plurality of textile-based sensors.

An ECG sensor system comprising: a substrate having a first side and a second side, the substrate of a non-conducting material; a plurality of textile-based sensors positioned on the first side, each of the plurality of textile-based sensors spaced apart from one another on the first side, the second side covering one side of the each of the plurality of textile-based sensors as an insulating covering, the each of the plurality of textile-based sensors including conductive fibres interlaced with one another; and a conductive trace connected to the each of the plurality of textile-based sensors, each of the conductive traces for connecting the plurality of textile-based sensors to an electronic controller for sending and receiving electronic signals from a selected pair of the plurality of textile-based sensors.

A signal measurement apparatus and signal measurement method are provided. The signal measurement apparatus includes a switching circuit configured to transmit a differential voltage signal to an amplifier, the amplifier configured to amplify the differential voltage signal; and a controller configured to output, in response to a signal value of the amplified differential voltage signal reaching a first threshold value, a control signal to change a connection of the switching circuit, wherein the switching circuit is configured to, based on the control signal, reverse connections between input terminals of the amplifier and paths along which the differential voltage signal is transmitted.

A signal measurement apparatus and signal measurement method are provided. The signal measurement apparatus includes a switching circuit configured to transmit a differential voltage signal to an amplifier, the amplifier configured to amplify the differential voltage signal; and a controller configured to output, in response to a signal value of the amplified differential voltage signal reaching a first threshold value, a control signal to change a connection of the switching circuit, wherein the switching circuit is configured to, based on the control signal, reverse connections between input terminals of the amplifier and paths along which the differential voltage signal is transmitted.

Detecting user contact with one or more electrodes of a physiological signal sensor can be used to ensure physiological signals measured by the physiological signal sensor meet waveform characteristics (e.g., of a clinically accurate physiological signal). In some examples, a mobile and/or wearable device can comprise sensing circuitry, stimulation circuitry, and processing circuitry. The stimulation circuit can drive one or more stimulation signals on one or more electrodes, the resulting signal(s) can be measured (e.g., by the sensing circuitry), and the processing circuitry can determine whether a user is in contact with the electrode(s). Additionally or alternatively, in some examples, mobile and/or wearable device can comprise saturation detection circuitry, and the processing circuitry can determine whether the sensing circuitry is saturated.

Detecting user contact with one or more electrodes of a physiological signal sensor can be used to ensure physiological signals measured by the physiological signal sensor meet waveform characteristics (e.g., of a clinically accurate physiological signal). In some examples, a mobile and/or wearable device can comprise sensing circuitry, stimulation circuitry, and processing circuitry. The stimulation circuit can drive one or more stimulation signals on one or more electrodes, the resulting signal(s) can be measured (e.g., by the sensing circuitry), and the processing circuitry can determine whether a user is in contact with the electrode(s). Additionally or alternatively, in some examples, mobile and/or wearable device can comprise saturation detection circuitry, and the processing circuitry can determine whether the sensing circuitry is saturated.

An implantable medical device (IMD) includes multiple stimulation engines (SEs) for independently stimulating respective electrode sets of a lead system. A voltage multiplier (VM) is configured to generate an adjustable target voltage at an output node. Each stimulation engine includes first switching circuitry to switchably connect an anodic node of the SE to the VM output node and second switching circuitry to switchably connect a cathodic node of the SE to a current sink circuit. Discharge switching circuitry may be disposed between the anodic and cathodic nodes of each SE. A selector and associated digital control logic block are operative to generate control signals for independently controlling respective SEs such that each SE may be activated to stimulate or discharge a corresponding select set of electrodes independently from or in concert with remaining SEs.

An ECG sensor system comprising: a substrate having a first side and a second side, the substrate of a non-conducting material; a plurality of textile-based sensors positioned on the first side, each of the plurality of textile-based sensors spaced apart from one another on the first side, the second side covering one side of the each of the plurality of textile-based sensors as an insulating covering, the each of the plurality of textile-based sensors including conductive fibres interlaced with one another; and a conductive trace connected to the each of the plurality of textile-based sensors, each of the conductive traces for connecting the plurality of textile-based sensors to an electronic controller for sending and receiving electronic signals from a selected pair of the plurality of textile-based sensors.